Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03befff9fa6bfe3…

MALICIOUS

PDF

92.5 KB Created: 2021-06-23 12:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 48d14f97fd15e476bbd2a8e35c276cf7 SHA-1: 1dc02a01633b41a0eef313613e9ecb33bbaddcac SHA-256: e03befff9fa6bfe3f68ca64f20e1a086d97c87f77d813b464f2b6b6f47adc5aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://tremonttemplemacon.com/clients/862779/File/venonoxete.pdf In PDF document text
    • http://pokemom2.com/uploads/files/42817163413.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609468f92cb3e---59331902495.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16083ebb069e49---50621185903.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/pseqga37r4c2t6f4qe46laie0l/46419902212.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac94474fad---71231660083.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/62484037180.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/tokivedidijabiwoduwises.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c45f567ee---53552409680.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b290820f50a---89325586946.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/jekuxujuvifovugiga.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/fuvulitodaxemawuli.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160accead9552b---28027913144.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/wupajexokovi.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/j7q0f8mgv8kn7v3nn379ncnnvr/5615969659.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/wawuwunis.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/11cb4ee2f5240febde25509f9224fefc/97774595270.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607773a7bec57---2328959450.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/527c612ce2be02a4fcfc11f0109626fb/45075351018.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607568de58676---revewivaxidimuzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=63+kg+in+lbsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11648 4976 bytes
SHA-256: 449357b4224a9e93ecb367eb0e422925c56b0c4d1ea99c00c42954ecfafb2d9d
font_01_sfnt_off0001274f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274F 12504 bytes
SHA-256: ec8c3cc0a17d3b38368e6fba6014a8a5f577abb7eb328cce214a0d7471b78999
font_02_sfnt_off00014f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F40 16184 bytes
SHA-256: b03d9720cbe5cb4c353beda7196ea63546e165be1e5f54a463d7f78543824f54